Evaluation of the expressed miR‑129 and miR‑549a in patients with multiple sclerosis

The expression of microRNAs (miRNAs) as circulating biomarkers has been underlined in multiple sclerosis (MS) in the last decade. Due to the presence of a possible relationship between expressed miRNAs and heterogeneous appearances of the pathological processes in MS, the present study attempts to evaluate the expression of miR‑129 and miR‑549a in patients with MS in comparison with healthy control (HC) group.

Peripheral blood mononuclear cells were separated from fifty patients with MS (subtypes including relapsing–remitting MS and secondary progressive MS) in the Kashani Hospital, Isfahan, Iran, and fifty people as HC group. After RNA extraction and complementary DNA synthesis, the expression of miR‑129 and miR‑549a was evaluated in patients with MS in comparison with the HC group using a quantitative real‑time polymerase chain reaction assay. The data were analyzed using the Kolmogorov–Smirnov and Mann–Whitney tests. Spearman’s correlation coefficient was used to examine the relationship between miR‑129 and miR‑549a with age.

The results showed that the expression of miR‑129 and miR‑549a was not significant in patients with MS in comparison with the HC group. Furthermore, the relationship between such miRNAs and age and gender was not significant.

We suggest the expression of miR‑129 and miR‑549a as circulating miRNAs in peripheral blood mononuclear cells could not be considered a biomarker for diagnosis and Para clinical.